Devices for drilling branched wells

Details Devices for drilling branched wells Devices for drilling branched wells

1987-04-30

1989-01-31

Novosad, Stephen J.

Boring or penetrating the earth

Means traveling with tool to constrain tool to bore along...

175 79, 175322, 285302, E21B 708

Patent

active

048009660

ABSTRACT:
A device for drilling lateral boreholes from a cased parent well comprises selecting and coupling means adapted to cooperate with a deflection unit placed within the parent well. The selecting and coupling means are mounted at the lower end of an extension unit formed by interassembled tubular elements. The upper end of the extension unit is rigidly fixed to a suspension swivel within the wellhead and at least one slip joint is interposed between two tubular elements. The internal diameter of each tubular element is such that a drilling packer can be housed within the tubular elements.

REFERENCES:
patent: 4007797 (1977-02-01), Jeter
patent: 4396075 (1983-08-01), Wood
patent: 4403654 (1983-09-01), Haynes
patent: 4415205 (1983-11-01), Rehm et al.
patent: 4444276 (1984-04-01), Peterson
patent: 4573541 (1986-03-01), Josse et al.
patent: 4693316 (1987-09-01), Ringgenberg et al.
patent: 4697651 (1987-10-01), Dellinger

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